Sectional bit or cutter.



PATENTED MAY 12, 1908.

0. G. HANSEN.

SECTIONAL BIT OR CUTTER.

.LPPLIGATION FILED JUNE 18, 1906.

2 SHEETSSHEET 1.

@MMJW.

PATENTED MAY 12, 1908.

C. C. HANSEN.

SEGTIONAL BIT 0R CUTTER.

APPLICATION FILED JUNE 18, 1906.

2 SHEETS-SHEET 2.

w m a MII IHESFE UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COM- PANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

SEGTIONAL BIT OR CUTTER.

Specification of Letters Patent.

Patented May 12, 1908.

To all whom it may concern:

Be it known that I, OHARLEs O. HANSEN, a citizen of the United States, and resident of Easton, in the count of Northampton and State of Pennsylvania, have invented a new and useful Improvement in Sectional Bits or Cutters, of which the'following is a specification.

My invention relates to a sectional bit or cutter and particularly to a bit or cutter adapted for use on coal mining machines, wit the object in view of providing a bit which may be constructed in an efficient and 3 is a side elevation of a five-pronged bit in which one side of the prong is in a radial line from the longitudinal axis of the bit, the cutting edge bemg ofi-se-t from this radial line, Fig; 4 is a face view of the same, Fig. 5 is a viewin detail showing one of the prongs of the radial edged bit in side elevation, Fig. 6

is a top plan view of the same, Fig. 7 1s a face view of the same, .Fig. 8 is a view in detail showing in side elevation one of the radial sided prongs, Fig. 9 is a plan view of the same, Fig. 10 is aface view of the same, ,Fig. 11 is a longitudinal-section of the holder for the radial edged prongs, Fig. 12 is an end view of the same, Fig. 13 is a longitudinal section of the holder for the radial sided prongs, and Fig. 14 is an end view of the While I have chosen for illustration a bit having five prongs, it is to be understood that the bits may be constructed with a greater or lesser number of prongs at pleas ure,'the shanks of the prongs being so formed as to com lete that part of a frustum of a cone whic one prong bears to the whole number of prongs, i. e., ii the number of prongs be five, then the shank of each will complete one-fifth of a frustum of a cone n i Sides will diverge at an angle of 72. If four prongs were employed, the shank of each would complete one-fourth of afrustum of'a cone and the-sides ofits shank would diverge at an angle of 90. If six prongs were used, the shank of each would complete one-sixth of a frustum of a cone and the sides would diverge at an angle of.

Referring first to the form as illustrated in Figs. 1, 2, 5, 6 and 7, where the cutting edge is in a radial line to the longitudinal axis of the cutter, each prong consists of a shank 1 from which projects the body 2 offset from or diverging from the shank and terminating in a cutting ed e 3, which lies in a radial line to the longitudinal axis of the cutter. The sides 4 and 5 of the prong in this five-pronged v cutter shown, diverge at an angle of 72 from the inner edge 6 which edge, instead of being made sharp, is cut away to form a blunt edge.

The opposite sides of the prong are provided the one with a projection 7 and the other with a recess 8 for the reception of projection on an adjacent shank, the rojection on the adjacent shank corresponc ing to the rojection 7.

hen assembled with a projection 7 in its recess 8 in an adjacent pron the whole group is inserted with its sharik within the opening 9 in the holder 10, the opening 9 being ta ered to corres ond to the taper of the outer ace 11 of the s iank so as to produce a wed e-like rou u on the rou of ron s to h old the in fi mlg in posi tion undgr en d pressure.

The interlocking of the several prongs, the one with another, serves to prevent any liability of one of the prongs shooting out independently of its neighboring pron s in the event one should Work loose while the others remain tight. I

In the form shown in Figs. 3, 4, 8, 9 and 10, the pron is given a lateral offset as well as a radial 0 set and its cutting edge is brought gut 'of radial alinement as clearly shown in i 4. 12% the body of the prong by 13; its cutting edge by 14 and the radial side by 15. The shanks 12 of this form are shown without interlocking projections and recesses, the frictional pressure exerted thereon by pressing them endwise into the ta ered openim 16 in the holder 17 being relie upon to hold them securely in osition While in operation.

What I c aim is:

1. A bit for use'in coal mining comprisin a plurality of sections terminating at one en in shanks and at the opposite end in cutting edges, the end portions of said shanks being In this from the shank is denoted by arranged to form when in assembled adjustment a frustum of a cone and a tapered holder adapted to closely embrace the assembled shanks where they form the frustum of a cone and re'ss the said shanks into closely assemble adjustment under working impact.

2. A bit for use in coal minin comprising a plurality of prong sections, the s anks of the prongs being arranged to laterally interlock the one with another and a holder for holding the prongs in assembled adjustment.

3. A bit for use in coal mining comprising a plurality of prong sections, each section being provided on one side with a projection and on the other side with a recess and means for holdin the several prongs in closely assembled a justment..

' In testimony, that I claim the foregoing as my invention, I have signed my name in resence of two witnesses, this fourteenth day of June 1906.

. CHARLES C. HANSEN. Witnesses: I

CHAs. B. BRUNNER,

A. GIEs. 

